Question

WOULD SOMEONE PLEASE CHECK MY ANSWERS?. . 1. Which of these pairs of elements is most likely to be part of a polyatomic ion?. . Rb and Cl. . Ba and O <-----. . C and N. . 2. Which of the following element combinations will likely form polyatomic ions?. . oxygen and carbon <-----. . sodium and bromine. . xenon and neon. . cesium and chlorine. . K and Br. . 4. Which of the following ions is not an oxyanion?. . CO^3^2-. . CN-. . SO^4^2-. . NO-

Answer 1

Your answer for the first question seems to be correct. The option B and O most likely to be part of a polyatomic ion. For question number two, your answer is also correct. They are the set of elements that will likely form poly atomic ions. For the last question , the correct answer is the option which has CN-.

Answer 2

Answer 1) The option B) Ba and O

Explanation : Barium and oxygen elements are the pairs which are most likely to be the part of polyatomic ion. As barium has +2 charge and Oxygen has -2 charge which will be settle once they form an polyatomic ion.

Answer 2) Oxygen and Carbon.

Explanation : Oxygen and carbon are the elements in nature which can combine with other elements and form a polyatomic ion. These are abundant in nature and can be easily form a polyatomic ion. Oxygenated and Carbonated polyatomic ions are found to be the most stable ions.

Answer 3) Option B)
`CN^(-)`

Explanation : The anion which contains the oxygen atom in its molecular formula can be called as oxyanion. In the given options
`CN^(-)` is the only option where there is no oxygen atom present in the molecular formula. Hence,
`CN^(-)` is the correct option.